A and B working separately can do a piece of work in 9 and 15 days respectively.

Question

A and B working separately can do a piece of work in 9 and 15 days respectively. If they work for a day alternatively, with A beginning, then the work will be completed in ?

Options:

A . 10 days

B . 11 days

C . 9 days

D . 12 days

Answer: Option B

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